Computer powers on but gets no signal to monitor

[diethaterade]

I have recently replaced a faulty motherboard, and added a new heatsink to my computer. My computer used to work fine, but now after I replaced the motherboard and added the heatsink I can see the computer power on (fans, powersupply leds, and GPU fans work), But when I plug my monitor into either the graphics card (Radeon 7800) or the integrated graphics card my monitor gets no signal and says "vga no signal".

Please Help!

 

[kapitalistas]

http://www.pcworld.com/article/200827/how_to_upgrade_your_motherboard_the_easy_way.html?page=2 some readings helped me a lot.

 

[diethaterade]

I've read through the article and I've double checked everything on the list. I've also reseated and cleaned my RAM multiple times. Still no dice. I might note that my motherboard is quite big though. I don't know if that matters. But thanks for the suggestion!

 

[kapitalistas]

I've read through the article and I've double checked everything on the list. I've also reseated and cleaned my RAM multiple times. Still no dice. I might note that my motherboard is quite big though. I don't know if that matters. But thanks for the suggestion!

actually anyway it should post logo or be ably go in to BIOS can be some wired misconfiguration .may help remove BIOS battery located under gpu round metal tablet thing(make shore your unplug your pc from the wall)for a minute and put it back and power up your pc.whats the model old mobo and new.